<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <table border="1" width="70%">
        <caption>标题</caption>


        <thead>
            <tr>
                <th>序号</th>
                <th>商品</th>
                <th>价格</th>
            </tr>
        </thead>

        <tbody>
            <tr>
                <td>1</td>
                <td>aaa</td>
                <td>99.0</td>
            </tr>

            <tr>
                <td>2</td>
                <td>bbb</td>
                <td>40.0</td>
            </tr>

            <tr>
                <td>3</td>
                <td>ccc</td>
                <td>20.0</td>
            </tr>
        </tbody>


        <tfoot>
            <tr>
                <td>xxxx</td>
            </tr>
        </tfoot>

    </table>


    <table border="1" width="70%">
        <tr>
            <th>序号</th>
            <th>商品</th>
            <th>价格</th>
        </tr>

        <tr>
            <td>1</td>
            <td>aaa</td>
            <td>99.0</td>
        </tr>

        <tr>
            <td>2</td>
            <td>bbb</td>
            <td>40.0</td>
        </tr>

        <tr>
            <td>3</td>
            <td>ccc</td>
            <td>20.0</td>
        </tr>
    </table>


    <table border="1" width="70%">
        <tr>
            <th>序号</th>
            <th>商品</th>
            <th>价格</th>
        </tr>

        <tr>
            <td>1</td>
            <td colspan="2">aaa</td>
        </tr>

        <tr>
            <td>2</td>
            <td rowspan="2">bbb</td>
            <td>40.0</td>
        </tr>

        <tr>
            <td>3</td>
            <td>20.0</td>
        </tr>
    </table>

    <form action="#">
        <table>
            <tr>
                <td>用户名：</td>
                <td><input type="text"/></td>
            </tr>
            <tr>
                <td>密码：</td>
                <td><input type="password"/></td>
            </tr>
        </table>
    </form>




























</body>
</html>